How To Detect Mouse Click Or Touch On A GameObject Using C# Script In Unity 3D

Introduction

This article is about how to detect mouse click or touch on a GameObject using C# Script in Unity

Prerequisites

Unity Environment version 2018.4.25f1

Create the project

I pressed ctrl + s to save this scene

Create the Script

Add a new C# Script, Right-click on Assets. Select Create >> C# script.

Rename the script as SceneOneScript.

Create Empty GameObject in Unity

Click on the "GameObject" menu in the menu bar. Select "Create Empty" option.

Rename the Create Empty as Scripts

Select the Right click create new scene

I am going to rename the scene as SceneTwo

Double click to open it create another script scene - Script again Right-click on Assets. Select Create >> C# script.

Rename the Script as SceneTwoScript

Create Empty GameObject in Unity

click on the "GameObject" menu in the menu bar. Select "Create Empty" option.

Rename the Create Empty as Scripts

Drag and drop your script to the scripts

Make sure to add your scenes in the Build Settings window, choose “Build Settings” Add open scene.

Double click in Scene One and it will open Visual Studio 2019, which is my programming integrated development environment (IDE) for Unity. Write the code as shown below:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
public class SceneOneScript: MonoBehaviour {
// Start is called before the first frame update
void Start() {}
// Update is called once per frame
void Update() {
if (Input.GetMouseButtonDown(0)) {
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
if (Physics.Raycast(ray, out hit)) {
//Select stage
if (hit.transform.name == "Cube") {
SceneManager.LoadScene("SceneTwo");
}
}
}
}
}

Save the Program

Create a cube in Unity.

Click on game object 3d and then I'm going to create a cube.

Click on SceneTwo open the scene

Create The Sphere in Scene View

Select GameObject, click the 3D object and pick the Sphere option. The Sphere object will be displayed in the scene view. The name is displayed in the hierarchy view.

InScene Two, double click it and it will open Visual Studio 2019, which is my programming integrated development environment (IDE) for Unity. Write the code as shown below:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
public class SceneTwoScript: MonoBehaviour {
// Start is called before the first frame update
void Start() {}
// Update is called once per frame
void Update() {
if (Input.GetMouseButtonDown(0)) {
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
if (Physics.Raycast(ray, out hit)) {
//Select stage
if (hit.transform.name == "Sphere") {
SceneManager.LoadScene("SceneOne");
}
}
}
}
}

Save the Program

Play the Application Click the sphere to SceneOne and Click the Cube to SceneTwo as You can see is navigating properly so this is the simple way you can tap or click on any gameobject

Summary

I hope you understood how to detect mouse click or touch on a GameObject Using C# Script in Unity.